Malicious PDF — malware analysis report

Static analysis result for SHA-256 54afe5ee93185c5a…

MALICIOUS

PDF

203.6 KB Created: 2021-03-18 12:01:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ba4896af6c6101d2f8be7f7605ea79a2 SHA-1: f233894823db0a739275f1e7b48581ec62ba80f2 SHA-256: 54afe5ee93185c5a1b892743a1f46ab8adc174a4baf046e5dc30a4fbb0a7d1d7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL, disguised as a conjugation chart, likely leads to a malicious resource. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit users through deceptive content and external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nipisod.ru/aws?utm_term=hebrew+verb+conjugation+chart PDF link annotation
    • http://rajajime.mypressonline.com/aprendizaje_significativo_tesis.pdfIn PDF document text
    • https://jifonoru.weebly.com/uploads/1/3/5/3/135316211/kivifiwabubub.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/ielts_reading_actual_test_2020.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/tovet_momuxoxibawip.pdfIn PDF document text
    • https://xizadububexo.weebly.com/uploads/1/3/4/5/134595199/mabog-moxosarifuba-likamefunijubel.pdfIn PDF document text
    • https://bunoworerut.weebly.com/uploads/1/3/1/4/131438217/9787081.pdfIn PDF document text
    • https://vedewoxid.weebly.com/uploads/1/3/0/7/130738666/zekopedajimujejonux.pdfIn PDF document text
    • https://tobisimotar.weebly.com/uploads/1/3/5/3/135330661/wavugawigubogumup.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/83937f1e17.pdfIn PDF document text
    • https://gesamuju.weebly.com/uploads/1/3/1/4/131453574/06b22415d6a5b.pdfIn PDF document text
    • https://kifoguwo.weebly.com/uploads/1/3/1/3/131383532/poropugovob.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/bukop.pdfIn PDF document text
    • http://maxoranano.sportsontheweb.net/21631141749.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daxafedijumexir.rf.gd/cefazolin_oral_form.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_a189e54841a94dba976343141b24c95d.pdf?index=trueIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_5bb92274a9e84f6790716c2d1f6bc3db.pdf?index=trueIn PDF document text
    • http://tapipawobux.rf.gd/genetics_biology_textbook.pdfIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_9a559231990c4d2c821b7046cc638ced.pdf?index=trueIn PDF document text
    • https://3b441492-4e67-469d-9170-473dc4762626.filesusr.com/ugd/cac9e4_0758e5759ef241c283a493d5a04803df.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B1CD 3312 bytes
SHA-256: cb5c8c6405a97e289a1d37fd8f3fa0fb9a9e5cd02c3f475be668e5c7f8c23a8c
font_01_sfnt_off0002bdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BDAE 5180 bytes
SHA-256: 25edce00468d5df66f56731f9ac54cfec32509a002eb466f69432288e7fb2fbc
font_02_sfnt_off0002cf67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF67 18780 bytes
SHA-256: d7f1fcbe2fb2f2ae81681140e3583096403047e5a8b4976acefa5409dccd850b
font_03_sfnt_off00030702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30702 16684 bytes
SHA-256: fe1ca6a691315ef32827512bb86cd3188d7c30cfa02bd4559714794831c9b14a

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